MagiskTrustUserCerts VS mitmproxy

I am doing this right now. I'm using burp to proxy the traffic from a mobile application to test it's APIs. I did the following: 1. Root device and install Magisk 2. Connect phone to computer running burp and Android Debug Bridge. 3. Establish proxy connection using adb tunnel and ProxyDroid app. 4. Download Burp certificate to phone (it's stopped in User trust store but needs to be put in System. 5. Use the following Magisk module. MagiskTrustUserCerts 6. Profit

This is true, by default Android apps do not trust user-installed certificate authorities. IMO the easiest solution if you're doing security testing on a dedicated device is MagiskTrustUserCerts[1]. If you're not testing on a dedicated device or you don't want to root the device, I'd recommend using the objection[2] tool which has a guided mode for patching an apk, and you can modify the manifest to add your CA or to trust all user-installed CAs.

[1]: https://github.com/NVISOsecurity/MagiskTrustUserCerts

[2]: https://github.com/sensepost/objection/wiki/Patching-Android...

2) in magisk install https://github.com/NVISOsecurity/MagiskTrustUserCerts

This statement gives a false sense of security. You can use a transparent proxy, like mitmproxy, to view HTTPS traffic - https://mitmproxy.org/. https://reedmideke.github.io/networking/2021/01/04/mitmproxy-openwrt.html

You'll need to install mitmproxy and set it up on your computer and iOS. I won't go into too much detail here on how to do this, but there are plenty of guides available. This is a pretty good one: https://nadav.ca/2021/02/26/inspecting-an-iphone-s-https-traffic/

TIL this goes back to 2006, how cool! We nowadays have a much simpler version as a mitmproxy example: https://github.com/mitmproxy/mitmproxy/blob/main/examples/ad.... Although it obviously does not work as well anymore with everything being HTTPS nowadays (unless you trust the cert of course). :)

Perhaps you could have your device use a proxy that can do the HTTPS unwrap for you? https://mitmproxy.org/ maybe?

A great way to test the effectiveness of a pinning implementation is by simulating an MITM attack. Tools like Mitmproxy or Wireshack allow us to create a test environment to monitor, intercept, and proxy network requests for a test host.